汽车实用技术
汽車實用技術
기차실용기술
PRACTICAL TECHNOLOGY OF AUTOMOBILE
2012年
2期
41-43
,共3页
泮战侠%白培谦%肖理%慕松
泮戰俠%白培謙%肖理%慕鬆
반전협%백배겸%초리%모송
失效分析%碳浓度%网状碳化物%脆性断裂
失效分析%碳濃度%網狀碳化物%脆性斷裂
실효분석%탄농도%망상탄화물%취성단렬
Failure Analysis%carbon concentration%network carbide%brittle fracture.
通过化学成分分析、硬度测试、渗碳层深度检测、断口形貌分析以及微观组织检查等实验分析,确定了重型卡车前簧弯耳平销断裂原因。分析结果表明：碳浓度过高,致使零件表层析出大量断续网状碳化物,增大了材料局部脆性,弱化了晶界,导致零件在装配时发生断裂。
通過化學成分分析、硬度測試、滲碳層深度檢測、斷口形貌分析以及微觀組織檢查等實驗分析,確定瞭重型卡車前簧彎耳平銷斷裂原因。分析結果錶明：碳濃度過高,緻使零件錶層析齣大量斷續網狀碳化物,增大瞭材料跼部脆性,弱化瞭晶界,導緻零件在裝配時髮生斷裂。
통과화학성분분석、경도측시、삼탄층심도검측、단구형모분석이급미관조직검사등실험분석,학정료중형잡차전황만이평소단렬원인。분석결과표명：탄농도과고,치사령건표층석출대량단속망상탄화물,증대료재료국부취성,약화료정계,도치령건재장배시발생단렬。
The fracture cause of the the heavy truck leaf-spring curved ear flat pins is researched by the chemical analysis,the hardness testing,the depth of the carburized layer mearuse,the appearance of fracture analysis and the microstructure test.The research shows that carbon concentration is over high,which is cased interrupted network carbide on the component surface,and interrupted network carbide increases local brittle and weakens grain boundary,which leads the component fracture when assembling.
